| abstract |
Disclosed is a luminescent ink containing a rare earth complex having high luminance and excellent light resistance, which is not visually recognized under white light but is excited by ultraviolet irradiation to emit light. A luminescent ink comprising a rare earth complex and a resin, wherein the rare earth complex is a rare earth complex represented by LnABC, wherein Ln is a rare earth metal, and A, B, and C are each of three different types of arrangements. A ligand having a phenanthroline skeleton or a bipyridium skeleton, a ligand B having a symmetric diketone skeleton, and a ligand C having an asymmetric diketone skeleton Luminescent ink. [Selection figure] None |